TWI743394B - Projection method and projector - Google Patents

Abstract

A projection method includes recognizing resolution of an original image, comparing the resolution of the original image with predetermined resolution to generate a comparison result, determining whether to tilt a projection lens during a process of projecting in response to the comparison result, and projecting at least one image in response to the comparison result during the process of projecting.

Description

Projection method and projector

This case is about a projection method and projector.

With the rapid development of display technology, 4K resolution images (that is, images with a resolution of 3840×2160) are becoming more and more popular. However, the projected pixels of ordinary projectors do not reach 4K resolution, and cannot directly project 4K resolution images. Therefore, no matter the original image is 4K resolution or lower than 4K resolution, the current projector will convert this original image into multiple images with the same resolution as the projection lens, and then use pixel shift. The way to project these low-resolution images at a high frame rate, so that when the human eye views these low-resolution images on the projection screen, a 4K image viewing experience can be generated due to visual persistence factors. However, such an image processing method may suffer some loss in image quality.

In some embodiments of this case, a projection method includes identifying the resolution of an original image, comparing the resolution of the original image with a preset resolution to generate a comparison result, and determining whether it is in the projection process according to the comparison result, A projection lens is deflected, and at least one image is projected during the projection process according to the comparison result.

In some embodiments of this case, a projector includes a projection lens, a lens deflector, a resolution recognition unit, a comparison unit, and an actuator. The lens deflector is electrically connected to the projection lens for deflecting the projection lens. The resolution identification unit is used to identify the resolution of the original image. The comparison unit is coupled to the resolution identification unit and used for comparing the resolution of the original image with the preset resolution and generating a comparison result. The actuator, coupled to the lens deflector, is used to actuate the lens deflector when the comparison unit judges that the resolution of the original image is higher than the preset When the resolution is less than or equal to the preset resolution, the lens deflector is not activated.

It can be seen from the above embodiments that the projector and its projection method provided in this case can first compare the recognized resolution of the original image with the preset resolution, and then determine whether to deflect the lens during the projection process according to the comparison result. That is to say, this kind of projection method can determine whether to project an image by pixel shift or not by visual resolution. In this way, when the original image is lower than the preset resolution (for example, 4K resolution, or any resolution between 4K resolution and full HD resolution), the projector can decide not to use pixel shift. Projecting images, so there is no need to convert the original image into a 4K image, which can avoid some image quality defects (such as distortion or deformation, etc.) generated when the original image is converted into a 4K image and the subsequent division to generate 4 frame images.

100: projection method

210: Image

212: The first pixel

220, 230, 240, 250: frame images

222, 232, 242, 252: second pixel

262: Hypothetical Pixel

S: Projection screen

S1, S2, S3, S10, S11, S12, S13, S14, S20, S21, S22, S23, S30, S31, S32, S33, S34, S35, S36, S37, S38, S40, S41, S42, S50, S51, S52, S53: steps

Z1: first zone

Z2: second zone

Z3: third zone

Z4: The fourth zone

300: Projector

302: image receiving unit

304: Resolution recognition unit

306: comparison unit

308: Actuator

310: lens deflector

312: Deflector control unit

320: image processing unit

322: Projection Control Unit

324: Projection lens

Figure 1 is a flowchart of a projection method according to an embodiment of the present case.

Figure 2 is a flowchart of the processing program 1 of Figure 1.

Fig. 3 is a flowchart of processing program 2 in Fig. 1.

Fig. 4 is a flowchart of processing program 3 in Fig. 1.

Fig. 5 is a flowchart of processing program 4 in Fig. 1.

Fig. 6 is a flowchart of the processing program 5 of Fig. 1.

FIG. 7A is a schematic diagram of an image with the first resolution according to an embodiment of the present case.

FIG. 7B is a schematic diagram of multiple frames of images generated after the image in FIG. 7A is processed by image processing.

FIG. 7C is a schematic diagram of sequentially projecting multiple frame images of FIG. 7B and synchronously deflecting the projection lens.

Fig. 8 is a system diagram of a projector according to an embodiment of the present case.

The following is a detailed description of the implementation manners in conjunction with the attached drawings to better understand the aspect of the case, but the implementation manners provided are not intended to limit the scope of the case, and the description of the structural operations is not intended to limit it. The order of execution, any recombination of components, to produce devices with equal effects, are all within the scope of this project.

In this case, when multiple components are referred to as "connection" or "coupling", it can be referred to as "electrical connection" or "electrical coupling", that is, there will be transmission of electrical signals between these components. In addition, although the terms "first", "second", ... and other terms are used in this case to describe different elements, the terms are only used to distinguish between using the same technical terms to describe different elements. The elements or operations described. Unless the context clearly indicates, the term does not specifically refer to or imply order or sequence, nor is it used to limit the case.

Please refer to Figure 1. Fig. 1 is a flowchart of a projection method 100 according to an embodiment of the present case. First, in step S1, the original image is received. In some embodiments, the source of the original image may be a computer, a game console, a DVD player, a Blu-ray player, or other similar electronic devices. In some embodiments, receiving the original image can be achieved through an HDMI/DVI interface, a Display Port interface, a D-Sub interface, or an AV synthesis/S-Video interface, but this case is not limited to this. In some embodiments, the original image may be a plurality of continuous images to form a movie. These images can also be called frames. Due to the persistence of human vision, usually when the frequency of the film is higher than 12 frames per second, these frames can produce the visual effect of "the film is continuous". Therefore, the original image can be multiple frames with a frame rate greater than 12. For example, the frame rate of the original image may be 120.

In step S2, the resolution of the original image is identified. In some embodiments, the resolution of recognizing the original image can be realized by software or firmware, and the software or firmware can be stored in the image scaler of the projector.

In step S3, the identified resolution Ri of the original image is compared with the first resolution R1 and the second resolution R2 to generate a comparison result. In some embodiments, the first resolution R1 and the second resolution R2 are preset resolutions stored in the projector 300, and the first resolution R1 is higher than the second resolution R2. The first resolution R1 may be a 4K resolution (3840×2160), that is, the amount of information containing 3840×2160 pixels. The second resolution R2 can be a full HD resolution (1920×1080), that is, it contains information of 1920×1080 pixels quantity. It can be understood that the second resolution R2 is the best resolution of the projector. In other words, when the projector projects an image with the second resolution R2, the projected image defects are the least. Therefore, regardless of the resolution of the original image, in the processing procedures 1, 2, 3, 4, and 5 executed after step S3, the projector is used to project the image with the second resolution R2 to enhance the projection screen Image quality on the screen. The processing procedures 1, 2, 3, 4 and 5 will be detailed below.

When the comparison result of step S3 is that the resolution Ri of the original image is higher than the first resolution R1, the process proceeds to step S10 and the processing procedure 1 is executed. Refer to Figure 2 for the detailed steps of Processing Procedure 1. First, in step S11, it is determined to deflect the projection lens during the projection process according to the comparison result that the resolution Ri of the original image is higher than the first resolution R1. In step S12, the resolution Ri of the original image (for example: resolution greater than 4K) is reduced to the first resolution R1 (for example: 4K resolution) according to the comparison result, so as to generate the first resolution. Relay image of R1. Next, in step S13, image processing is performed on the relay image to generate N frame images with a second resolution R2 (for example, full HD resolution). Then, in step S14, N frame images with the second resolution R2 are projected sequentially, and the projection lens is synchronized to deflect the projection lens to project the N frame images to different positions on the projection screen in a sequential manner, where N is A positive integer greater than 1.

The implementation of steps S13 to S14 can be referred to as shown in FIGS. 7A to 7C, but this case is not limited to this. FIG. 7A is a schematic diagram of an image 210 with a first resolution R1 (for example, a 4K resolution) according to an embodiment of the present case. The image 210 has a plurality of first pixels 212. FIG. 7B is a schematic diagram of four frame images 220, 230, 240, and 250 generated after image 210 has been processed. Each frame of image 220, 230, 240, and 250 has a resolution lower than the first resolution R1 The second resolution R2 (for example: full HD resolution). Specifically, the frame images 220, 230, 240, and 250 have a plurality of second pixels 222, 232, 242, and 252, respectively. Since the resolution of the frame images 220, 230, 240, and 250 after image processing is lower than that of the image 210 before image processing, the size of each of the second pixels 222, 232, 242, and 252 is larger than The size of the first pixel 212 of the image 210 before image processing. For example, in an embodiment in which the first resolution R1 is 4K resolution and the second resolution R2 is full HD resolution, each of the second pixels 222, 232, 242, and 252 in the X direction The size is about twice the size of the first pixel 212 in the X direction, and the size of each of the second pixels 222, 232, 242, and 252 in the Y direction is also about the size of the first pixel 212 in the Y direction. Twice the size in the direction.

FIG. 7C is a schematic diagram of sequentially projecting frame images 220, 230, 240, and 250 and simultaneously deflecting the projection lens according to an embodiment of the present case. As shown in FIG. 7C, the projection lens can first project the frame image 220 onto the first zone Z1 (for example, the upper left zone) of the projection screen S. The projection lens can then be deflected, and after the deflection is completed, the frame image 230 is projected to a second zone Z2 (for example: the upper right zone) that is different from the first zone on the projection screen S, where the first zone Z1 is shifted to the second zone. The offset of the zone Z2 roughly corresponds to the size of the first pixel 212 (see FIG. 7A) in the X direction. Then, the projection lens is deflected again, and after the deflection is completed, the frame image 240 is projected to a third zone Z3 (for example, the lower right zone) that is different from the first and second zones Z1 and Z2, where the second zone Z2 is offset The amount of shift to the third zone Z3 roughly corresponds to the size of the first pixel 212 in the Y direction. Then, the projection lens is deflected again, and after the deflection is completed, the frame image 250 is projected to a fourth zone Z4 that is different from the first, second, and third zones Z1, Z2, and Z3 (e.g. Such as: the lower left area), where the offset from the third area Z3 to the fourth area Z4 roughly corresponds to the size of the first pixel 212 in the X direction, and the offset direction is offset from the first area Z1 The direction to the second zone Z2 is opposite. Then, the lens is deflected again to the first zone Z1, and the next frame image 220 is projected. The offset of the fourth zone Z4 to the first zone Z1 roughly corresponds to the size of the first pixel 212 in the Y direction , And the offset direction is opposite to the offset direction from the second zone Z2 to the second zone Z3.

When the switching frequency of these frame images 220, 230, 240, and 250 is higher than the frequency recognizable by the human eye (for example: switching more than 12 times per second), based on the visual persistence effect of the human eye, the image projected on the projection screen S These frame images 220, 230, 240, and 250 will produce a visual perception similar to the original 4K image. In order to facilitate a more detailed explanation, a plurality of virtual pixels 262 are shown on the projection screen S in FIG. 7C, and the size of these virtual pixels 262 is the same as the first pixel 212 of the image 210. In other words, these virtual pixels 262 can jointly form an image with the first resolution R1 (for example, 4K resolution). When the frame images 220, 230, 240, and 250 are projected on the projection screen S in the aforementioned manner (that is, the frame images 220, 230, 240, and 250 are projected sequentially with the imaginary pixel 262 as the offset), it is based on the human eye With the persistence of vision effect, the human eye will perceive the 4K image composed of these imaginary pixels 262.

It can be seen from the foregoing that, in some embodiments, in step S12 of FIG. 2, the relay image generated by reducing the resolution of the original image to the first resolution R1 may be, for example, the image 210 shown in FIG. 7A. The N frame images generated in step S13 can be, for example, the frame images 220, 230, 240, and 250 shown in Figure 7B, and the projection method of step S14 can be, for example, the frame image shown in Figure 7C. Images 220, 230, 240, and 250 are projected to different areas Z1, Z2, Z3, and Z4 in a sequential manner.

Please refer back to FIG. 1. When the comparison result of step S3 is that the resolution Ri of the original image is equal to the first resolution R1, step S20 is entered, and processing procedure 2 is executed. Refer to Figure 3 for the detailed steps of Processing Procedure 2. First, in step S21, according to the comparison result that the resolution Ri of the original image is equal to the first resolution R1, it is determined to deflect the projection lens during the projection process. And in step S22, image processing is performed on the original image with the first resolution R1 (for example: 4K resolution) to generate N frame images with the second resolution R2 (for example: full HD resolution). Then, in step S23, N frame images with the second resolution R2 are projected sequentially, and the projection lens is synchronously deflected to project the N frame images to different positions on the projection screen in a time sequence.

In some embodiments, the original image with the first resolution R1 may be, for example, the image 210 shown in FIG. 7A, and the N frame images generated in step S22 may be, for example, the frame images 220 and 230 shown in FIG. 7B. , 240, and 250, and the projection method of step S23 can be, for example, the method of sequentially projecting the frame images 220, 230, 240, and 250 to different regions Z1, Z2, Z3, and Z4 as shown in FIG. 7C.

Please refer back to FIG. 1. When the comparison result of step S3 is that the resolution Ri of the original image is lower than the first resolution R1 and higher than the second resolution R2, the process proceeds to step S30 and the processing procedure 3 is executed. Refer to Figure 4 for the detailed steps of Processing Procedure 3. First, in step S31, it is determined whether the identified original image resolution Ri is less than or equal to the third resolution R3 between the first resolution R1 and the second resolution R2. In one embodiment, the third resolution R3 is smaller than the first The first resolution R1 is greater than the second resolution R2. In one embodiment, the third resolution R3 is an average value of the first resolution R1 and the second resolution R2, and is a preset resolution stored in the projector 300. For example, when the first resolution R1 is 4K resolution (3840×2160) and the second resolution is full HD resolution (1920×1080), the third resolution R3 may be (2880×1620), but This case is not limited to this.

In step S31, if the identified original image resolution Ri is higher than the third resolution R3, proceed to step S32, according to the original image resolution Ri is lower than the first resolution R1 and higher than the second resolution The comparison result of R2 and higher than the third resolution R3 determines the deflection of the projection lens during the projection process. And in step S33, the original image resolution Ri is increased to a first resolution R1 (for example, 4K resolution) to generate a relay image with the first resolution R1. Next, in step S34, image processing is performed on the relay image to generate N frame images with a second resolution R2 (for example, full HD resolution). Then, in step S35, N frame images with the second resolution R2 are projected sequentially, and the projection lens is synchronized to deflect the projection lens to project the N frame images to different positions on the projection screen in a time sequence.

In some embodiments, the relay image with the first resolution R1 generated in step S33 may be, for example, the image 210 shown in FIG. 7A, and the N frame images generated in step S34 may be, for example, as shown in FIG. 7B The frame images 220, 230, 240, and 250 of step S35 can be projected to different areas Z1, Z2, Z3, and Z4 in time sequence as shown in Figure 7C. Way.

In step S31, if the recognized original image resolution When Ri is less than or equal to the third resolution R3, step S36 is entered, and it is determined not to deflect the projection lens during the projection process. And in step S37, the original image resolution Ri is reduced to a second resolution R2 (for example, full HD resolution) to generate an adjusted image with the second resolution R2. Then, step S38 is executed to project the adjusted image without deflecting the projection lens. That is to say, under such conditions, the resolution of the image does not need to be increased to 4K resolution, which can avoid the distortion and other image quality defects that may be caused by the original image in the process of converting the original image into 4K, and there is no need to use special The pixel shift method used for 4K images to project images.

Please refer back to FIG. 1. When the comparison result of step S3 is that the resolution Ri of the original image is equal to the second resolution R2, step S40 is entered, and the processing procedure 4 is executed. Refer to Figure 5 for the detailed steps of Processing Procedure 4. As shown in FIG. 5, in step S41, it is determined not to deflect the projection lens during the projection process according to the comparison result that the resolution Ri of the original image is equal to the second resolution R2. And in step S42, the original image is projected without deflecting the lens. That is to say, under such conditions, the original image can be directly projected without increasing the resolution to 4K resolution, which can avoid the distortion and other image quality defects that may be caused by the original image in the process of converting the original image to 4K. , And it is not necessary to use the pixel shift method specially used for 4K images to project images.

Please refer back to FIG. 1. When the comparison result of step S3 is that the resolution Ri of the original image is lower than the second resolution R2, step S50 may be entered and the processing procedure 5 may be executed. Refer to Figure 6 for the detailed steps of Processing Procedure 5. First, in step S51, it is determined not to deflect the projection lens during the projection process according to the comparison result that the resolution Ri of the original image is lower than the second resolution R2. And in step S52, The resolution Ri of the original image is increased to the second resolution R2 to generate an adjusted image with the second resolution R2. Then, in step S53, the adjusted image can be projected without deflecting the lens. That is to say, in such a situation, there is no need to increase the resolution of the image to 4K resolution, which can avoid the distortion and other image quality defects that may be caused by the image in the process of converting the image into 4K. Use the pixel shift method dedicated to 4K images to project images.

Please refer to Figure 8. FIG. 8 is a system diagram of the projector 300 according to an embodiment of the present application. As shown in Figure 8, the projector 300 includes an image receiving unit 302, a resolution recognition unit 304, a comparison unit 306, an actuator 308, a lens deflector 310, a deflector control unit 312, an image processing unit 320, and a projection control unit 322 and the projection lens 324, and the lens deflector 310 is electrically connected to the projection lens 324. In some embodiments, the image receiving unit 302 can be implemented through an HDMI/DVI interface, a display connection port interface, a D-Sub interface, or an AV synthesis/S-Video interface, but this case is not limited to this.

The resolution recognition unit 304 is coupled to the image receiving unit 302, and the resolution recognition unit 304 is used to recognize the resolution Ri of the original image. The comparison unit 306 is coupled to the resolution identification unit 304. In some embodiments, the comparison unit 306 is used to compare the resolution Ri of the original image recognized by the resolution recognition unit 304 with the first resolution R1 (for example: 4K resolution) and the second resolution R2 (for example: full HD resolution). When the comparison unit 306 determines that the resolution Ri of the original image is higher than the first resolution R1, a first comparison result is generated and the aforementioned processing procedure 1 is triggered. When the comparison unit 306 determines that the resolution Ri of the original image is equal to the first resolution R1, a second comparison result is generated and the aforementioned processing procedure 2 is triggered. When the comparison unit 306 determines that the resolution Ri of the original image is lower than the first resolution R1 and higher than When the second resolution is R2, the third comparison result is generated and the aforementioned processing procedure 3 is triggered. When the comparison unit 306 determines that the resolution Ri of the original image is equal to the second resolution R2, a fourth comparison result is generated and the aforementioned processing procedure 4 is triggered. When the comparison unit 306 determines that the resolution Ri of the original image is lower than the second resolution R2, a fifth comparison result is generated and the aforementioned processing procedure 5 is triggered.

In some embodiments, when the processing procedure 3 is triggered, the comparison unit 306 further compares the resolution Ri of the original image with a third resolution R3 between the first and second resolutions R1 and R2. When the comparison unit 306 determines that the resolution Ri of the original image is higher than the third resolution R3, a first advanced comparison result is generated, and step S32 and subsequent steps in the processing procedure 3 are triggered. When the comparison unit 306 determines that the resolution Ri of the original image is less than or equal to the third resolution R3, a second advanced comparison result is generated, and step S36 and subsequent steps in the processing procedure 3 are triggered.

In some embodiments, the resolution recognition unit 304 and the comparison unit 306 can be implemented by software or firmware, and the software or firmware can be stored in the image scaler of the projector 300. In addition, the first resolution R1, the second resolution R2, and the third resolution R3 between the first and second resolutions R1, R2 may be different preset resolutions stored in the image scaler. Thus, in the image scaler, the comparison unit 306 can compare the resolution Ri of the original image recognized by the resolution recognition unit 304 with the first resolution R1, the second resolution R2, and the third resolution R3.

In some embodiments, the image processing unit 320 is coupled to the comparison unit 306 and the projection control unit 322 to determine whether to perform image processing on the original image (for example, adjust the resolution) according to the comparison result generated by the comparison unit 306 After that, the projection control unit 322 controls the projection lens 324 to project the corresponding image. In some embodiments, the image processing unit 320 and the projection control unit 322 can be implemented using software, firmware, or hardware in the projector 300.

When the comparison unit 306 generates the first comparison result and triggers the above-mentioned processing procedure 1, the image processing unit 320 reduces the resolution Ri of the original image to the first resolution R1 according to the first comparison result to generate a first resolution R1 The relay image, and then, the image processing unit 320 performs image processing on the relay image to generate N frame images with the second resolution R2, and provides the N frame images with the second resolution R2 to the projection control unit 322 for subsequent projection.

When the comparison unit 306 generates the second comparison result and triggers the aforementioned processing procedure 2, the image processing unit 320 performs image processing on the original image according to the second comparison result to generate N frame images with the second resolution R2, and will have The N frame images of the second resolution R2 are provided to the projection control unit 322 for projection.

When the comparison unit 306 generates the third comparison result and triggers the aforementioned processing procedure 3, and then generates the first advanced comparison result to trigger the step S32 of the processing procedure 3, it is determined to deflect the projection lens 324 during the projection process. The step S33 of the processing procedure 3 is triggered according to the first advanced comparison result, and the image processing unit 320 can increase the resolution Ri of the original image to the first resolution R1 to generate a relay image with the first resolution R1. Then, the image processing unit 320 may perform image processing on the relay image to generate N frame images with the second resolution R2, and provide the N frame images with the second resolution R2 to the projection control unit 322 for projection .

When the comparison unit 306 generates the third comparison result and triggers the aforementioned processing procedure 3, and then generates the second advanced comparison result to trigger the step S36 of the processing procedure 3, it is determined not to deflect the projection lens 324 during the projection process. Then step S37 of the processing procedure 3 is triggered, and the image processing unit 320 can reduce the resolution Ri of the original image to the second resolution R2 to generate an adjusted image with the second resolution R2, and will have the second resolution R2 The adjusted image is provided to the projection control unit 322 for projection.

When the comparison unit 306 generates the fourth comparison result and triggers the aforementioned processing procedure 4, the image processing unit 320 does not adjust the resolution Ri of the original image according to the fourth comparison result, and provides the original image to the projection control unit 322 for subsequent projection. .

When the comparison unit 306 generates the fifth comparison result and triggers the above-mentioned processing procedure 5, the image processing unit 320 increases the resolution Ri of the original image to the second resolution R2 according to the fifth comparison result to generate a second resolution R2 The adjusted image is provided to the projection control unit 322 for projection.

The actuator 308 is coupled to the comparison unit 308 and the lens deflector 310. In some embodiments, the actuator 308 is used to determine whether to activate or deactivate the lens deflector 310 corresponding to the comparison result of the aforementioned comparison unit 307. In some embodiments, the actuator 308 can be any type of device that can move the lens deflector 310 according to electrical signals, such as a motor or a piezoelectric device, but the present case is not limited to this.

When the comparison unit 306 generates the first and second comparison results or the first advanced comparison result among the third comparison results, and triggers step S35 in the above-mentioned processing procedures 1, 2 or 3, the actuator 308 will actuate the lens The deflector 310 deflects the projection lens 324 arranged on the lens deflector 310.

In contrast, when the comparison unit 306 generates the fourth and fifth comparison results, or the second advanced comparison result in the third comparison result, and triggers the step S38 in the processing procedure 4, 5 or the processing procedure 3, it causes The actuator 308 does not actuate the lens deflector 310, so that the projection lens 324 remains stationary during the projection process.

In some embodiments, the deflector control unit 312 is coupled to the lens deflector 310 and the projection control unit 322. When the lens deflector 310 is activated, the deflector control unit 312 is used to control the lens deflector 310 in a sequential manner. Deflection projection lens 324. In some embodiments, the deflector control unit 312 is coupled to the projection control unit 322, so the deflector control unit 312 can make the deflection timing (or frequency) of the projection lens 324 substantially synchronized with the N control units controlled by the projection control unit 322. The projection timing (or frequency) of the frame image. In some embodiments, the deflector control unit 312 can be implemented using software, firmware, or hardware in the projector 300.

Although this case describes the disclosed projection method as a series of steps, it should be understood that the sequence of these steps should not be interpreted as a limitation. In addition, when implementing one or more aspects or implementations described herein, not all the steps shown here are necessary. In addition, one or more steps of this case may also be executed in one or more separate steps and/or stages.

In summary, the projection method of this case can first identify the resolution of the original image, and the visually recognized resolution of this case can determine whether to project the image by means of pixel shift. Therefore, when the resolution of the original image meets certain conditions (for example: less than or equal to the preset resolution), the projector may not use The pixel shift method specially used for 4K images is used to project the image, which can avoid the distortion and other image quality defects that may be caused by the original image in the process of converting the original image into the 4K image, so as to improve the viewing quality of the user.

The content of this case has been disclosed in the implementation manner as above, but it is not used to limit the content of this disclosure. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, the content of this disclosure The scope of protection shall be subject to the scope of the attached patent application.

100‧‧‧Projection method

S1, S2, S3, S10, S20, S30, S40, S50‧‧‧Step

Claims (11)

A projection method includes: identifying the resolution of an original image; comparing the resolution of the original image with a preset resolution to generate a comparison result; determining whether to deflect a projection lens during a projection process according to the comparison result; and At least one image is projected during the projection process according to the comparison result. The projection method according to claim 1, wherein the predetermined resolution includes a first resolution and a second resolution, and the first resolution is higher than the second resolution. The projection method according to claim 2, wherein when the comparison result is that the resolution of the original image is lower than the second resolution, the projection lens is not deflected during the projection process, and the comparison result is based on the comparison result. The step of projecting the at least one image in the projection process further includes: increasing the resolution of the original image to generate an adjusted image; and projecting the adjusted image. The projection method according to claim 2, wherein when the comparison result is that the resolution of the original image is equal to the second resolution, the projection lens is not deflected during the projection process, and the original image is projected. The projection method according to claim 2, wherein when the comparison The result is that the resolution of the original image is higher than the second resolution and lower than the first resolution, and the resolution of the original image is lower than or equal to an average value of the first resolution and the second resolution , The projection lens is not deflected during the projection process, and the step of projecting the at least one image during the projection process according to the comparison result further includes: reducing the resolution of the original image to generate an adjusted image; and projecting the The image has been adjusted. The projection method according to claim 1, wherein when the comparison result is that the resolution of the original image is equal to the first resolution, when the projection lens is deflected during the projection process, and the projection is performed according to the comparison result The step of projecting the at least one image in the process further includes: converting the original image into N frame images, the resolution of the frame images is lower than the resolution of the original image, and N is a positive integer greater than 1; and The frames of images are projected sequentially, and the projection lens is synchronized to be deflected. The projection method according to claim 1, wherein when the comparison result is that the resolution of the original image is higher than the first resolution, the projection lens is deflected during the projection process, and the projection is performed according to the comparison result The step of projecting the at least one image in the process further includes: reducing the resolution of the original image to generate a relay image; converting the relay image into N frame images, the resolution of the frame images is lower than that of the relay image The resolution of the image, and N is a positive integer greater than 1; and the frames of images are projected sequentially, and the projection lens is synchronously deflected. The projection method according to claim 2, wherein when the comparison result is that the resolution of the original image is lower than the first resolution and higher than the second resolution, and the resolution of the original image is higher than the first resolution When the resolution is an average value of the second resolution, the projection lens is deflected during the projection process, and the step of projecting the at least one image during the projection process according to the comparison result further includes: improving the original image Resolution to generate a relay image; convert the relay image into N frame images, the resolution of the frame images is lower than the resolution of the relay image, and N is a positive integer greater than 1; and timing The frames of images are projected ground, and the projection lens is synchronously deflected. A projector includes: a projection lens; a lens deflector electrically connected to the projection lens for deflecting the projection lens; a resolution recognition unit for recognizing the resolution of an original image; a comparison unit, coupled Connected to the resolution identification unit for comparing the resolution of the original image with a preset resolution and generating a comparison result; and an actuator, coupled to the lens deflector, for determining the When the resolution of the original image is higher than the preset resolution, the lens deflector is actuated, and the actuator is further used to prevent the original image from being caused when the comparison unit determines that the resolution of the original image is less than or equal to the preset resolution Move the lens deflector. The projector according to claim 9, further comprising: an image processing unit for changing the resolution of the original image to generate An adjusted image, and the projection lens is used to project the adjusted image when the lens deflector is not activated. The projector according to claim 9, further comprising: an image processing unit for changing the resolution of the original image to generate a relay image, and converting the relay image into N frame images, the frames The resolution of the image is lower than the resolution of the relay image, and N is a positive integer greater than 1, wherein the projection lens is used to project the frames of images sequentially when the lens deflector is actuated.

Images